I know a few decks I want this to go into, and the planeswalker does generic Black effects well enough that I think most decks would consider it in a deck with Black as part of its identity
Cards with prepare are creatures first, but they also come with a built-in spell attached
If you want to try Moogle Typal, this Heralds Horn fits perfectly within the theme
The three-drop enchantment in your upkeep will toss a couple of counters here and then mill that many, then if you would draw from an empty library, you instead will get a free Zombify
Rile replaces itself, gives a creature trample, and is cheap to cast, while Dual Shot and Slash of Talons present versatile options that can be used against enemy creatures as well as your own
take on a solid drain trigger and you get one of blacks best aristocrat commanders: Sephiroth, Fabled SOLDIER